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Efficient market hypothesis


From the previous several ages the efficiency of currency markets has been the sole purpose of clinical tests. As a result, several theories have been presented and implemented in relation to principally how the competition in the currency markets will induce the known information in to the prices of securities. The data of information on a variety of securities that are bought and sold on the market is one of the major factors in influencing the motions of currency markets. In the stock market, a securities price will move go up and semester depending mainly on the option of the info. The stock prices in the effective market correspond to available information and for that reason register any rise or fall mainly when recent and unpredictable information is offered. The along in the security prices basically depends upon advantages and disadvantages associated with the available information also to what extent it will affect the company's performance which is displayed by the security. As it is very hard to tell if the information available pays to or not, just as it is quite impossible to make predictions about the development of the stock market, such that whether you will see an upward or downward style soon by using the available information. Inside the financial market it is not mandatory that professionals related to market always possess the info about the securities and also have skills to evaluate this information for their gain. The only thing the reliable market requires is that few individuals must have the info about securities and as a result of the information supplied by them, the complete market must be well informed and benefitted. Hence the available information takes on an important role in deciding the efficiency of the currency markets.

By focussing on the aforementioned idea, the idea of Efficient Market Hypothesis has been developed and became one of the most focused and debatable subject matter among professionals and folks related to financing and stock market studies.


The primary goal of my research is to analyse the efficiency of stock market supported by the concept of Efficient Market Hypothesis. It also seeks to depict the impact of the Efficient Market Hypothesis on security trading by reviewing the available books.


My research aims to answer the next questions:

  • To what scope the available information, according to the idea of Efficient Market Theory, impacts the security trading in stock market.
  • What is insider trading and its effect on the efficiency of stock market.
  • What are the various types of anomalies associated with the currency markets and their effect on the currency markets efficiency.


In this part of my research paper I will re-examine the prevailing literature on the anomalies and the efficiency of the stock market.

"An 'efficient' market is thought as a market where there are large numbers of rational, profit-maximizers positively contending, with each endeavoring to forecast future market values of person securities, and where important current information is nearly freely open to all participants. In an efficient market, competition among the many intelligent participants leads to a situation where, at any time, actual prices of specific securities already echo the effects of information structured both on occasions that contain already happened and on events which, as of this moment, the market needs to occur in the future. Quite simply, in an successful market at any time the real price of any specific securities already represent the effects of information established both on events which have already occurred and on events which, as of this moment, the market expects to take place in the foreseeable future. In other words, in an effective market at any time the real price of an security is a good estimation of its intrinsic value. "(Eugene F. Fama 1965)

According to the Efficient Market Hypothesis, distributed by Fama, the pros and cons in the prices of securities in the financial market totally reveal known information at a given time frame. In other words, Efficient Market Hypothesis claims that the trading of securities by the individuals is usually carried out strictly based on the assumption that securities price are always pretty much than the price offer by market. Whereas, trading of securities trying to outperform the stock market will be luck rather than professional skills if current prices completely echo all available information as well as stock market segments are efficient. Corresponding to this hypothesis "if new information is disclosed about a company it will be incorporated in to the share price rapidly and rationally, with respect to the way of the show price movement and how big is that activity. " (Elearn' -NetTel). Efficiency is an unclear word in itself so to get more detailed clarification, in my own dissertation, I am going to describe all sorts of efficiencies: operational, allocation and costing. I'll also give full detail on levels of market efficiency : weak-form efficiency, semi-strong form efficiency and strong-form efficiency.

According "Random walk theory ", there are no trends and format that are being followed by the costs of securities in stock market. There exists another fact distributed by this theory which says that the prices of securities in the past can't be great for future predictions and fluctuation in prices.

The Efficient Market Hypothesis and anomalies related to the currency markets developed by the experts always contrasts with one another. "The search for anomalies is effectively the search for systems or patterns you can use to outperform passive and/or buy-and-hold strategies. " (Invest Home). Along with the invention of any anomaly, there's always some sort of exploitation by the shareholders of the anomalies found out to be able to increase their earnings. This practice make the anomaly disappear with the duration of time. There are so many inside and external factors of the entities that influences the procedures of stock market and the ones factors are often known as Anomalies which takes on an important role in over executing or under accomplishing the procedures of the stock market by taking under consideration the fact these anomalies have good or bad effect on the prices of companies and entities. There are different types of anomalies plus some of the anomalies are talked about.

Fundamental Anomalies:

First kind of anomaly is fundamental anomaly which quite simply depends upon the price tag on the stock and on days gone by performance of the entity credited to which stock prices increases or show up. Several anomalies of these kinds exist related to the progress, present value and success of the firms concerned. Under important anomaly, there exist a most historical and famous anomaly known as "Value spending" and is undoubtedly the most likely technique for investment purposes. These anomalies depend on the stock value and company's performance based on which the stock prices go up or down. A technique used is to split the given index into high price and good deal to publication value stocks. The low price to reserve concept was developed by Eugene Fama and Keneth People from france favouring the hypothesis that lower risk is mounted on value companies whereas the stocks with progress are fastened with higher risk. Matching to some other anomaly known as as low price to sales, shares with good deal to sales proportion perform better then high price to sales ratio. According to Adam P. O' Shaughnesey, prices will be the only strongest determinant of increased return. There are several studies which advocates that securities having low P/E proportion always perform better on the market as compared to stocks and shares with high P/E ratios. In the same manner, the companies with high dividend produce are better performers than securities with low dividend produces. There are some other stocks known as as neglected stock and are chosen by people that have the contrarian strategy. A study was conducted by F. M DeBondtand Richard Thaler on 35 best and most severe performer shares between 1932 and 1977 in NY Stock Exchange and came out with the effect that the performance of best performer securities in the stock exchange falls whereas the securities with bad performance before showed greater results when compared to the results of the same stock before.

Technical Anomalies:

Another types of anomalies where past prices and figures are used to predict the costs of securities are known as complex anomalies. The techniques used in these kinds of anomalies include strategies related to aid and resistance, moving averages and durability. Some analysts are against the technique of technical analysis and say that the traders are hardly benefitted from these specialized analysis techniques where as some researchers claim that there surely is enough data and facts that are sufficient to state that the complex analysis method is favourable for the traders. According to technological analysts, the selling of companies is inspired by the resistance level whereas the buying is affected at the support level. A sign to market the stock is developed in the event the support level is penetrated by the price whereas a signal to buy the stock is produced in case price penetrated the amount of resistance level. Based on the conclusion created by William Brock, Josef Lakonishok, and Blake LeBaron, the final results are reliable with technological rules having forecasting electricity. But at exactly the same time the price related to deal must be taken into consideration before employing such principles and strategies. Another realization distributed by them says that the stock dividends generating is more complicated and different process when compared with the results obtained by performing different studies and researches using various linear models.

Calendar Anomalies:

Calendar anomaly is a different type of anomaly in which various effects are included. In January effect, basic and small stocks perform abnormally better in jan. Philippe Jorion and Robert Haugen say that, "the January impact is, perhaps the best-known example of anomalous behaviour in security market segments across the world. " A fascinating reality about January impact is the fact it lasted for almost 2 decades whereas any anomaly scarcely survive as dealers start taking good thing about the anomalies which results in vanishing of anomaly. Another effect named Change of the Month was founded by Chris R. Hensel and William T. Ziemba, matching to which, among period 1928 to 1993, the dividends for the change of the month performed well and noticeably greater than normal performance. Relating to study, those buyers who make regular purchases may be benefitted if indeed they make plan to do the purchasing at the end and prior to the starting of next month. In addition to these results another effect is recognized as Monday effect and is considered to be the most severe day in stock market if investments are made upon this day. According to study conducted by Lawrence Harris, the week end result occurs during first 45 minutes of buying and retailing whereas prices shows upwards trend during the first 45 minutes of trading on all other days. This kind of anomaly may occur anticipated to moods and behaviour of individuals after weekend vacations.

Other Anomalies

There are certain other facts that are in charge of affecting the procedures of stock market. The size result, announcement based effect, IPOs, Stock buybacks, insider ventures and S and P game.

According to Fama and French (1992), the reserve to market proportion as well as the size get the cross-sectional deviation of average stock earnings in NYSE, and Nsdaq securities. A complete investigation of publication to market was provided by Tim Loughran in relation to dimensions of organization size, exchange listings etc and experimental findings of France and Fama are quite simply forwarded by two top features of the data which includes relatively low profits on small, new and growing stocks and options. Srinivas Nippani, Augustine C. Arize review three main US commercial relationship market indices by taking into account calendar established anomalies between your years 1982-2002. Within the analysis, the whole bond market as well as two broad classes of business namely industrials and resources were taken into account. The analysis find the mixed response for the weekend result in the overall connection index and industrial index whereas very less response to utilities index. The findings showed definite proof of January effect on the relationship market.


Data Collection Methods:

The general notion of business research is that it is concerned with assortment of data, making questionnaires and then analysing and analyzing the accumulated data. In addition to this, the id of problem and the way had a need to solve the challenge is also important. (Ghauri et al. , 1995). Data options are often known as the providers of data information. Essentially data resources are split into two categories specifically principal data and extra data. Primary data can be involved with the interviews and observations gathered while conducting research study where as, supplementary data is collected by others and educational and non academic sources are included in this kind of data.

In my theme of research which is to study the efficiency of stock market, I wish to use the Desk method that is extra data collection method. This consists of the gathering of information from options like books, journals related to my topic of research, and from electric multimedia like internet which is one of the major resources of information. All of these sources of information will be helpful for the achievement of my research.

DATA Options:

As I've already describe that I'll use extra method in my own dissertation so I have to search a lot because of this topic and for this search my main source is FBES (Faculty of Business, Environment and Culture) which gives the best web business information services which is also like the digital management catalogue. Some of the key sources (journal databases) for my research area are given below:

  • EBSCO Business Source.
  • Business Source Premiere.
  • Emerald.
  • Science Direct.
  • NetLibrary.

Overall these cover a huge selection of journals, and give access to up to a million journal articles.


While reviewing everything from available books on reliable market hypothesis, functions of currency markets, price fluctuations and the anomalies of stock market, I've come to the final outcome that the next final results could be possible and predictable from my research,

  • If the currency markets is useful then no information can play any role in making any change into the performance of stock market.
  • The successful market hypothesis is expected to take the following forms that are weakened, semi-strong and strong which strictly depends after the availableness, and trueness of the past and present information about the stock concerned in the currency markets.
  • The anomalies like complex anomalies could be of great help to the experts and experts to anticipate the changing craze in the prices of stocks and shares in the currency markets but the transaction cost is the reason for concern while using such complex method.
  • There are some other currency markets anomalies which solely depend upon the internal and exterior factors of the entity and could bring about fluctuations in the currency markets.
  • The anomalies related to currency markets exist for short time period but function against the concept of useful market hypothesis and in my research I'll find out the facts associated with the vibrations in the currency markets consequently of these anomalies.


While performing my research I must face certain troubles and limitations which may occur during the course of my research. As my research entails the assortment of secondary data, I must be quite alert to the limitations which may arise due to the dynamics of data. Some of the limits that are possible are as follows

  • It could be possible that the idea and data we gathered for our research is unclear and it is not helpful for the companies in their decision making.
  • It is important to check the foundation of the info as it could be wrong and misleading.
  • It can be done that the theory is quite old for studies and research purposes in the current rapidly developing world.
  • The theory might not be fit for application scheduled to development of new and technical methods and techniques used for the research.


  1. Chris R. Hensel and William T. Ziemba (1996)"Investment Results from Exploiting Turn-of-the-Month Effects, " Journal of Profile Management 22, 17-23
  2. Elearn - NetTel Financial Evaluation Revised: Treatment 1: Market Efficiency [Online] Available From: http://cbdd. wsu. edu/kewlcontent/cdoutput/TR505r/page4. htm
  3. Eugene Fama and Kenneth R. French (1992)"The Cross-section of Expected Stock Results, " The Journal of Fund 47, 427-465.
  4. Eugene F. Fama (1995) "Random Strolls in Stock Market Prices, " Financial Analysts Journal 21, 55-59.
  5. Ghauri, P. , Gronhaug K and Kristianslund I. , (1995) "Research methods in business studies - a practical guide" Hempstead: Prentice Hall
  6. Investor Home Historical Stock Market Anomolies [Online] Available From:
  7. James P. O'Shaughnessy (1998) 2nd edn. What Works on Wall membrane Street: HELPFUL INFORMATION to the Best-Performing Investment Strategies of All Time. New York: McGraw Hills
  8. Lawrence Harris (1986) "A Transfer Data Research of Regular and Intradaily Patterns in Stock Earnings, " Journal of Financial Economics 16, 99-117
  9. Loughran Tim (1997)''Book-to-Market across solid Size, Exchange, and seasonality: Is There an impact?'' Journal of Fund & Quantitative Examination 32, 249-268
  10. Marc R. Reinganum (1997) "THE SCALE Effect: Evidence and Potential Explanations, " Investing in Small-Cap and Microcap Securities, Relationship for Investment Management and Research, 1997.
  11. Robert Haugen and Philippe Jorion, (1996)"The January Effect: Still There in the end These Years, " Financial Analysts Journal, January-February 1996.
  12. Srinivas Nippani and Anita K. Pennathur (2004) "Day-of-the-week effects in commercial paper yield rates. " Quaterly Overview of economics & Funding 44, 508-520
  13. Werner F. M. DeBondtand Richard Thaler (1985)"Does the Stock Market Overreact?" The Journal of Fund 40, 793-805.
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